package com.test.servlet;

import com.test.pojo.Person;

import javax.servlet.ServletException;
import javax.servlet.http.*;
import java.io.IOException;

public class SessionDemo1 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //解决乱码问题
        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("utf-8");
        resp.setContentType("text/html;charset=utf-8");

        //得到Session
        HttpSession session = req.getSession();

        //给Session中存东西
//        session.setAttribute("name", "张三");
        session.setAttribute("name",new Person("张三",20));

        //获取Session的ID
        String sessionId = session.getId();

        //判断Session是不是新创建的
        if(session.isNew()){
            resp.getWriter().write("session创建成功，ID: " + sessionId);
        }else{
            resp.getWriter().write("session已经在服务器中存在了，ID: " + sessionId);
        }
//        //Session创建的时候做了什么事情：
//        Cookie cookie = new Cookie("JSESSIONID", sessionId);
//        resp.addCookie(cookie);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}
